Upright Dimensions

[minicountryman1961]

Perhaps you can show us what happens with a real tire that distorts under load, instead of your depiction of a solid inflexible tire?

I have never seen a rectangular tire in the real world, which is where we drive our cars.

Originally Posted by trick-kit

Indeed Bonzo, please accept my humble appologies for not introducing myself first.

However my first post was actually to supply the OP with the information he asked for, as no-one else seems to have answered his question, but when you've quoted me you seem to have deleted the important part of my reply and just concentrated on the obsevation I've made about the design. which I have said isn't ideal, nothing else.

Here is what my observations are, please study the drawing below





I have simplified the drawing to show what is important, the pivot points on the chassis and the hubs are represented by the circles. The drawing represents a car to book dimensions on 195/50/15 tyres with a ride height of 4" (as seems to be most popular for it) in static, 1 degree & 3 degrees of body roll. And no, I haven't doctured any drawings to exagerate this.

As you can see the outside wheel (the one loaded in cornering) gradually lifts the inside edge of the tyre clear of the ground, pictures on the Saturn website back this up, the reason the car may feel "balanced" is because both ends do the same.

What I am saying is that the design can be improved, if you are building using the MX5 upright then with a little time and patience you can achieve a design that will provide good wheel control in roll, it's always a balancing act but it is possible to get very close to ideal.